Don Carlo Gesualdo
Here's a nice, short (abridged) biography of the late Renaissance composer Don Carlo Gesualdo, which I found here. To summarize, he's an insane, awful man, who on multiple occasions attacked his spouses. His story is disturbing, almost matching the madness in his compositions:
[Carlo] Gesualdo’s passion for music began at a very young age, as with Mozart, and as a child he had no interests outside his lute and harpsichord and singing, apart from an interest in the other young boys that he sang with. As the second son he could indulge his interest as the running of the estate would fall upon the shoulders of his brother, Luigi, and not himself. But in 1584 his elder brother died and it became incumbent upon Carlo to produce the necessary heir. The bride chosen for him was his cousin Donna Maria d’Avalos and they married in 1586...Futhermore the marriage was not for love but procreation. A son was required to continue the line and to prevent the estate reverting to the Papacy. Donna Maria had already been widowed twice before the age of thirty, having been first married at the age of fifteen, and importantly, had already produced two children so was demonstrably fertile (she is also claimed to have been beautiful and charming). The requisite son, Don Emmanuele, was rapidly produced and within a couple of years the Prince had lost interest in her returning to his young men and music.
...[Donna Maria] would find a new love-interest in the form of young Don Fabrizio Carafa, Duke of Andria, himself married and father to four children.
In order that they could meet and indulge themselves thay had to bribe the many servants who were in constant attendance and affording no privacy; but they managed a two-year passionate affair before wind of it got to Prince Gesualdo. They were not so much discovered as betrayed by Don Carlo’s uncle, Don Giulio, who had himself approached Donna Maria and been rebuffed on many occassions. "...But when whispers came to his ears concerning the loves and pleasures of Donna Maria and the Duke of Andria, such was the wrath and fury which assailed him on discovering that the strumpet did lie with others, that straightway he revealed all to the Prince."
All might still have been well with Don Fabrizio suggesting that they should cool things as he was aware that knowledge of their dalliance was spreading, but Princess Donna Maria declared that she was not afraid of discovery and if he was then he should be a lackey not a Prince. She would rather suffer the sword than his betrayal. Thus he agreed that they would, if necessary, die for their love. Don Carlo laid a trap for them by announcing that he was departing on an overnight hunting expedition; and hunt he did by smashing down Donna Maria’s bedroom door discovering the pair in flagrante delicto (well they were actually asleep post-flagrante delicto) whereupon he set upon and murdered them both and ordered that their naked bodies be exposed to the public. The next day all the city flocked to see. Donna Maria’s stab wounds were mostly in her belly "..and more particularly in those parts which she ought to have kept chaste" and the Duke had even more grevious wounds. It is even reported that whilst the corpes were exposed a San Dominican monk ravished Donna Maria’s inert body.
Because of his rank Gesualdo was never brought to trial for these murders but it would seem they did affect him deeply and were possibly the start of a manic depressive mental illness. In atonement he, like Macbeth, razed the forest around his castle so that his shame could not be hidden by it and he built a monastery with a chapel for which he commissioned a painting showing himself, the wicked uncle, Don Giulio, the corpses of Maria and her lover...
...In spite of having murdered his wife another one was soon found for him. The Duke Alfonso II d’Este of Ferrara did not have an heir and wished to prevent his estate reverting to the papacy. He proposed that his cousin, Eleonora d’Este should marry Gesualdo to circumvent this. Gesualdo was persuaded, not by any beauty of Eleonora whom he had never met, but by the musical riches at Duke Alfonso’s court who was himself fanatical about music. In February, 1594 they were married in courtly splendour and the union was celebrated in many odes, sonnets and madrigals. The next couple of years were very productive for Gesualdo and he composed the four books of five-part madrigals for which he has become known. Every day the court musicians would assemble after dinner and sing for a couple of hours accompanied by an amazing range of instruments described by the chronicler Girolamo Merenda as including cornetti, tromboni, dolzaine (?), piffarotti (?), viole, ribecchini, lute,guitar, harp, clavicembalo, and an archicembalo which had several keyboards and a capacity for producing microtones.
Don Carlo Gesualdo may have become a great musician but he was not a good husband and conducted several affairs (dallying with both sexes) and there were rumours that he was cruel to his new wife, who by now had born him a son, Alfonsino. In 1596 he returned to Gesualdo without his wife and child intent on setting up his own musical court. The next year Duke Alfonso died and with him the musical tradition at Ferrara, and Eleonora and Alfonsino rejoined Don Carlo at Gesualdo. Don Carlo was already ill with asthma but he rapidly became afflicted with a manic depressive illness leading to a deterioration in his behaviour exhibited in sadism and masochism. He began to illtreat his wife, beating her and ignoring her and flaunting a pretty new mistress. Yet whenever Eleonora went away he would long for her and beg her to return only for the violence to start again. Don Carlo became so deranged that he felt he could have no peace unless he was beaten three times a day by a team of ten young men. He "...was unable to go to the stool, without having been previously flogged by a valet kept expressly for the purpose." He found it soothing to receive blows to the temple and other parts of the body...